Trimethylamine N-Oxide (TMAO), Whole Blood Test

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Feature	Labcorp	Quest Diagnostics
Price	$66.99	Coming soon
Results in	~5 business days	—
Sample type	Blood Whole Blood	—
Require fasting	No	—

About the test

Trimethylamine N-oxide (TMAO) is a compound produced by gut bacteria from dietary nutrients such as choline and carnitine. Measuring TMAO levels can help assess cardiovascular disease risk, evaluate gut microbiome imbalance (dysbiosis), and monitor the effectiveness of TMAO-reducing interventions.

Included biomarkers & Reference ranges

Biomarker	Reference range
Trimethylamine N-Oxide (TMAO) Trimethylamine N-oxide, a compound produced by gut bacteria from certain foods (like red meat and eggs). Elevated levels are studied as a marker of cardiovascular risk.	—

Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.

Preparation

Fasting for 10 to 12 hours before your blood draw is recommended but not required.
Fasting before a blood draw means you don't eat or drink anything except water.
Your doctor should provide any special instructions related to fasting for your test. Always follow your doctor's instructions.

How it works

1. Order online No referral or insurance
2. Get a requisition By email in 24–72 hours
3. Visit a draw center Bring a matching photo ID
4. Get results Securely by email

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Consultations

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

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